ATK Engines HP73C-EFI High Performance Crate Engine Small Block Chrysler 360ci / 320HP / 410TQ
059-HP73C-EFI
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ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
Please CLICK HERE for ATK Core Return Process
NOTE:
- Core return can be any Small Block Chrysler 360ci engine
Engine Specifications
This engine is perfect for a street cruiser, great street ability, stock idle, and good power.
- Horsepower: 320 hp
- Torque: 410 ft.-lbs.
Block Information:
- Seasoned OE Magnum roller block 1993-2001
- Bore/Stroke: 4.060 in, x 3.580 in.
- Displacement: 360 ci
Rotating Assembly:
- Crankshaft: OE cast
- Balance: External
- Rods: OE 6.123 in.
- Compression Ratio: 9.1:1
- Pistons: Hypereutectic
- Rings: Moly
Camshaft Specs:
- Camshaft: Hydraulic roller
- Cam Duration @ .050 in.: OE Magnum grind
- Cam Lift: OE Magnum grind
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: OE Magnum cast iron
- Combustion Chamber: 65cc
- Valve Size: 1.78 in. Intake / 1.50 in. Exhaust
- Rocker Arms: Steel 1.6 pedestal rockers
Oil Pan Information:
- Oil Pan: OE front sump
- Oil Pump: Melling standard volume
Engine Break-In Procedure
Use break-in oil or conventional (non-synthetic) 10w30 oil with zinc additive for the first 500 miles of operation. Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. It is best to avoid long periods of idling during this period. Check the engine oil and coolant levels daily.
Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. Let the engine cool down completely and repeat the process 2-3 more times. Do not idle the engine for an extended period at this time, this is critical for breaking in the camshaft.
At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil with a zinc additive. Check fuel and ignition settings, adjust valves (where applicable). Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading or long periods of idling.
Change the oil and oil filter again at 1,000 miles. Continue using conventional (non-synthetic) oils and zinc additive, until about 4,000 miles. At that point, you may run a quality 10w30 synthetic oil if you choose. Using an oil with zinc or a zinc additive for the life of your engine is recommended.
Specifications:
Will this fit a 1988 W100? Current engine is a 318. What will I need to buy extra to make the swap? Will you take the 318 as a Core?
Will this fit into an 87 ramcharger?
Will this fit in my 1978 Dodge Magnum. It has the original 360.
Will this bolt up and work in my 1997 dodge ram 2500?
Will this engine fit in a 1990 Dodge van ? Thanks
Will this work in my 1997 dodge ram 1500 4x4 if it already has a 5.9 magnum in it. Will it be a direct bolt it replacement
Will this work in my 86 power ram? Had original 318 and need a new engine.
Will this work in a 1999 dodge ram with stock wiring harness
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.